Crusher



Feb. 25, 1930. R BERNHARD CRUSHER Filed May 24. 1929 3 Sheets-Sheet l ATTORNEYS.

Feb. 25, 1930. R BERNHARD 1,748,102

GRUSHER- Filed May 24. 1929 3 Sheets-Sheet 2 BY Rch/d e'nhad ATTORNEYS.

Peb. 25, 1930. R. BERNHARD 5 Sheets-Sheet 5 cRUsHER Filed May 24, 1929 INVENTOR:

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Patented Feb. 25, 1930 UNITED STATES PATENTl OFFICE RICHARD BERNHARD, F ALLENTOWN, PENNSYLVANIA, A'SSIGNOR T0 TRAYLOR ENGINEERING & MFG. COMPANY, OF ALLENTOWN, PENNSYLVANIA, A CORPORA- TION 0F PENNSYLVANIA CRUSHER Application led May 24, 1929. Serial No. 365,732. t

My said invention relates to improvements in gyratory Crushers of Jthe type disclosed in an application for Letters Patent of the United States filed by August, 1928, Serial Number 300,549.

The invention aims to provide an improved form of balancing or yielding supporting means for the head or crushing cone which will protect the Crusher against breakage when non-crushable material (such for example as tramp iron), enters the hopper, and against excessive stress if the crusher should become packed with clayey material.

The invention further aims to provide means which will enable the head to be adaccompanying drawings in which:

F1gure l is a I central vertical section through the crusher.

Fig. 2 isa horizontal section online 2--2 of Fig. 1.

Fig. 3 is a section through the upper end of the shaft, spider, and associated parts on line 3 3 of Fig. 2.

Fig. 4 is a detail ysection on'hne 4-4 of Fig.

Fig. 5 is a central vertical section through a modified form of crusher.

Fig. 6 is a section on line 6-6 of F1 5, and Fig. 7 is a detail section on hne ,-7 of 1g.

Fig. 8 is a detail elevation of the spring cage and associated parts. f

Referrin by reference characters to these drawings, t e numeral 1 designates the shaft of the crusher which carries a crushing cone 2 provided with a crushing mantle 2*". The shaft is suspended at its upper end Aby means hereinafter more fully described, by. the supporting spider 4 (such means permitting gyratory` movement of the depending shaft),

me on the 18th day of which spider, inthe form shown in Fig. 1 is formed or cast integral with a top shell part 5 i to the inner face of which the lining concave sections 6 are applied. This shell part 5 rests upon and is bolted to a bottom shell 7 which contains the discharge, diaphragm, and eccentric bearing.

As these latter parts and the means for operating the eccentric are substantially the same as shown in my aforesaid application and also in my prior Patent 1,336,015 dated April 6, 1920, a more detailed description thereof herein is deemed unnecessary.

The upper end of the shaft l carries a sleeve 8 which is slightly tapered upwardly on its exterior to correspond to thegyratory mo vement of the shaft, and connection between the sleeve and shaft is effected by the customary contracting nut 9 screwed on to the reduced upper end la of the shaft, the exterior surface of the nut being downwardly tapered to coact with the correspondingly tapered in ner wall of the upper end of the sleeve 8. Said sleeve is surrounded by a oating bushing 10 which has at its lower end an inwardly extending annular ange or shoulder 10a which,

underlies the lower end of the sleeve 8 and supports the same (and thereby the gyratory shaft) through the intermediary of the'wear ring 11. i i

Said floating bushing has an outwardly projecting fla-nge 10b at its upper end which overlies the arm terminals 12a of a lever (or levers), 12 fulcrumed in a hollow portion of the spider 4 as clearly shown in Fig. 2. The portions of the lever arms 12 adjacent their ends 12El are curved so as to be approximately concentric to the shaft and their ends are delected upwardly and provided with convex v bearing edges to contact with the flange 10b as shown by dotted lines in Fig. 1, against which they act withr a sliding or cam action. Said lever arms are fulcrumed on pins set in the wall of the spider, portions of these pins projecting into the spaces between the oating bushing 10 and spider hub, and the arms being provided on their under sides with curved recesses 12c to receive the exposed portions of the pins.

The opposite ends of levers -12 are connected 100 to this end provide opposed spring seats 16 and 17 having openings through' which the rod passes and a pair of springs 18 located on opposite sides of the rod and having their ends seated in the spring seats 16 and 17 and confined therebetween. Spring seat 1,6 4has approximately wedge shaped bearing ribs 16a on Vopposite sides of the rod which engage corespondingbearing recessesin the rib members 19 on the underside of the spider on f opposite sides f the opening 4a.

s crushers, it is desirable to make the top shell` The lower end of the rod is threaded to receive'a nut 20 which is provided with an operating lever or 'handle 21 by which it may be rotated to adjust the tension of the springs.

The spring seats are preferably provided with cage bolts 18a passing centrally through the springs and slidably engaging openings in the spring seat 17. The spider is provided with an integral portion 4b lying between the lever arms as shown in Fig. 2 from which figure it will be seen that the floating bushing is maintained in axial position at all times.

It will'be readily apparent from the foregoing description that I provide means for yieldably supporting the Crusher shaft and cone whereby these are capable of yielding under excessive stress, and furthermore, such means is capable of ready adjustment during `the operation of the crusher.

Cover members 22 and 22a are preferably provided for covering tne upper end of the shaft and sleeve assembly and the lever arms to exclude dust, etc.

The top 0f the shell portions 5 lying between the spider arms and which constitutes the feed hopper is provided with wear plates In a Crusher of the type described, 'due to the fact that the head' or cone is of larger diameter at its base than'the concave, the shell portion 5 must necessarily be removed before the coneV and shaft may be lifted out when this is desired. By making the top shell and spider integral, this removal is simplified and there is a saving in weight and simplification and economy of manufacture.

Such construction, however, issuitable only for smaller sizes of crushers. For larger and spider of separate parts,

Such construction is illustrated in Fig. 5 in which the spider 4X seats in recesses or bearing seats in the upper portion of the top shell 5", the spring rodl passing through alined openings in the bottom of the spider and corresponding seat portion of the shell.

In such heavier types, I prefer to provide morel springs, usingbpreferably groups of j positely facing bearing recesses or seats of a seat member 24 slidable on the rod 15a and t cage bolts which latter in this form are preferably located between the springs.

Having thus described my invention whatV I claim is:

1. In a gyratory crusher a concave shell, a

vspider carried thereby, a lever fulcrumed in the spider, a gyratory crusher shaft having its upper end rotatably supported from said lever, and means for adjusting the position of said lever;

2. A gyratory crusher according to claim 1 in which the concave shell and spider are formed integral.

3. In a gyratory crusher a concave shell, a spider carried thereby, a.` lever fulcrumed in the spider, a gyratory crusher shaft having its upper end rotatably supported from said lever, spring means acting on said lever to hold the shaft elevated, and means for adjusting the Aaction of said spring means.

4. In a gyratory crusher av concave shell, a i

spider carried thereby having a central bearl ing portion and hollow arm, a floating bushing guided in said bearing portion, a crusher shaft supported from said bushing, lever means fulcrumed in said hollow arm and operatively engaging said bushing, and adjustable spring restraining means acting on said lever means. v

6. In a gyratory Crusher, a concave shell, a spider carried thereby having acentral bearing portion and hollow arm, a floating bushing guided in said bearing portion, a

-crusher shaft suspended from said bushing,

said bearing portion having recesses leading from said hollow arm to oppositesides of said floating'bushing, rlever arms fulcrumed on said spider and operatively engaging said bushing, and spring means acting on said lever arms.

'7. vvIn a gyratory crusher, a concave shell, a spider carried thereby having a central bearing portion and hollow arm, a vertically movable bushing in said bearing portion, said bearing portion having recesses on op'- posite sides of the floating bushing communieating with said hollow arm, said bushing havin shoulder means at its upper end, lever arms aving portions fulcrumed in said recesses and ends engaging said shoulder means,

adjustable spring means acting on said lever arms, and a crusher shaft suspended from said ioating bushing. y

8. In a gyratory crusher a concave shell, a spider carried thereby having a central bearing portion, a oating bushin guided in said bearing portion, a crusher s aft supported from said bushing, lever means of the first order engaging said bushing and overlyin one of the arms of the spider, a rod connecte to said lever means and depending through an opening in the s ider arm, and adjustable restraining means or said rod.

9. In a gyratory crusher a concave shell, a spider carried thereb having a central bearing portion, a floatlng bushin uided in said bearing portion, a crusher s a supgorted from "said bushing, lever means of the rst order engaging said bushing and overlying one of the arms of the spider, a rod connected to said lever means and depending through an openin in the spider arm, spring means interposed etween said spider arm and the end of said rod, and means for adjusting the pressure of said springs.

10. In a gyratory crusher, a concave shell, a spider carried thereby having a central bearir portion and hollow arm, a vertically movab e bushin in said bearing portion having an internal ange at its lower end, a sleeve within the bushing supported by said flange, a crushershaft supported by said sleeve, said bearing portion having recesses on opposite sides of said bushing communicating with said hollow arm, lever arms in said hollow arm having portions projecting into said recesses, and fulcrumed therein, saidbushings having shoulders overlying said lever arms, and restraining means acting on said lever arms.

11. A gyratory Crusher according to claim 10 having pins inserted in openings in the sides of the bearing portion of the spider and projecting into the spaces beneath the lever arms to serve as fulcrums therefor.

In testimony whereof, I aliix my signa-ture.

RICHARD BERNHARD. 

